asyncrat | 7300c7b0a478fe6da9bf95c90630f0bb712127e52e99aaad889428a2de1fbc5f

General

Target

7300c7b0a478fe6da9bf95c90630f0bb712127e52e99aaad889428a2de1fbc5f.exe
Size

1.7MB
MD5

4617174e6053cbec25e7c18bace5d231
SHA1

5ebef0ad6997b7948ca30057b64a0c7687b25d33
SHA256

7300c7b0a478fe6da9bf95c90630f0bb712127e52e99aaad889428a2de1fbc5f
SHA512

cc405d0798d437ca7ab5d6fe0c09b726e5ae16057e20f8f83d54633b17993387a6bd353c390129c1f546e11d40d1296ec21135e5b7f9baeedc2e928e3f9fd57f
SSDEEP

24576:tXKRZcz+jlc4ibwDQMfUU4EzR5TZ+4QFZ3mBuETqyQN7RsHXdsjszjUxov7tTX:QS+Xl4aRn+xVaqyQNaNsgbv7FX

Score

10^/10

asyncrat default discovery rat upx

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

allay.x3322.net:5050

Mutex

gnrfjlujxmukjuvrs

Attributes

delay
1
install
true
install_file
WriteFile.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

VenomRAT 5 IoCs

Detects VenomRAT.

rat

Processes:

resource	yara_rule
behavioral2/memory/2352-0-0x0000000000400000-0x00000000005FF000-memory.dmp	VenomRAT
behavioral2/memory/2352-3-0x0000000000400000-0x00000000005FF000-memory.dmp	VenomRAT
C:\Client.exe	VenomRAT
behavioral2/memory/4300-16-0x0000000000270000-0x0000000000288000-memory.dmp	VenomRAT
behavioral2/memory/2352-19-0x0000000000400000-0x00000000005FF000-memory.dmp	VenomRAT

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
C:\Client.exe	family_asyncrat

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

7300c7b0a478fe6da9bf95c90630f0bb712127e52e99aaad889428a2de1fbc5f.exeClient.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation	7300c7b0a478fe6da9bf95c90630f0bb712127e52e99aaad889428a2de1fbc5f.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation	Client.exe

Executes dropped EXE 2 IoCs

Processes:

Client.exeWriteFile.exe

pid process

4300 Client.exe
112 WriteFile.exe

pid	process
4300	Client.exe
112	WriteFile.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral2/memory/2352-1-0x0000000068CD0000-0x0000000068CDF000-memory.dmp	upx
behavioral2/memory/2352-2-0x0000000068CD0000-0x0000000068CDF000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

620 2352 WerFault.exe 7300c7b0a478fe6da9bf95c90630f0bb712127e52e99aaad889428a2de1fbc5f.exe

pid	pid_target	process	target process
620	2352	WerFault.exe	7300c7b0a478fe6da9bf95c90630f0bb712127e52e99aaad889428a2de1fbc5f.exe

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

7300c7b0a478fe6da9bf95c90630f0bb712127e52e99aaad889428a2de1fbc5f.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	7300c7b0a478fe6da9bf95c90630f0bb712127e52e99aaad889428a2de1fbc5f.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

2380 timeout.exe
Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence execution

Scheduled Task
T1053.005

Processes:

schtasks.exe

pid process

4640 schtasks.exe

pid	process
2380	timeout.exe

pid	process
4640	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

Processes:

7300c7b0a478fe6da9bf95c90630f0bb712127e52e99aaad889428a2de1fbc5f.exeClient.exeWriteFile.exe

pid	process
2352	7300c7b0a478fe6da9bf95c90630f0bb712127e52e99aaad889428a2de1fbc5f.exe
2352	7300c7b0a478fe6da9bf95c90630f0bb712127e52e99aaad889428a2de1fbc5f.exe
4300	Client.exe
4300	Client.exe
4300	Client.exe
4300	Client.exe
4300	Client.exe
4300	Client.exe
4300	Client.exe
4300	Client.exe
4300	Client.exe
4300	Client.exe
4300	Client.exe
4300	Client.exe
4300	Client.exe
4300	Client.exe
4300	Client.exe
4300	Client.exe
4300	Client.exe
112	WriteFile.exe
112	WriteFile.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Client.exeWriteFile.exe

description pid process

Token: SeDebugPrivilege 4300 Client.exe
Token: SeDebugPrivilege 112 WriteFile.exe

description	pid	process
Token: SeDebugPrivilege	4300	Client.exe
Token: SeDebugPrivilege	112	WriteFile.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

7300c7b0a478fe6da9bf95c90630f0bb712127e52e99aaad889428a2de1fbc5f.exeWriteFile.exe

pid	process
2352	7300c7b0a478fe6da9bf95c90630f0bb712127e52e99aaad889428a2de1fbc5f.exe
2352	7300c7b0a478fe6da9bf95c90630f0bb712127e52e99aaad889428a2de1fbc5f.exe
112	WriteFile.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

7300c7b0a478fe6da9bf95c90630f0bb712127e52e99aaad889428a2de1fbc5f.exeClient.execmd.execmd.exe

description	pid	process	target process
PID 2352 wrote to memory of 4300	2352	7300c7b0a478fe6da9bf95c90630f0bb712127e52e99aaad889428a2de1fbc5f.exe	Client.exe
PID 2352 wrote to memory of 4300	2352	7300c7b0a478fe6da9bf95c90630f0bb712127e52e99aaad889428a2de1fbc5f.exe	Client.exe
PID 4300 wrote to memory of 2516	4300	Client.exe	cmd.exe
PID 4300 wrote to memory of 2516	4300	Client.exe	cmd.exe
PID 4300 wrote to memory of 4980	4300	Client.exe	cmd.exe
PID 4300 wrote to memory of 4980	4300	Client.exe	cmd.exe
PID 4980 wrote to memory of 2380	4980	cmd.exe	timeout.exe
PID 4980 wrote to memory of 2380	4980	cmd.exe	timeout.exe
PID 2516 wrote to memory of 4640	2516	cmd.exe	schtasks.exe
PID 2516 wrote to memory of 4640	2516	cmd.exe	schtasks.exe
PID 4980 wrote to memory of 112	4980	cmd.exe	WriteFile.exe
PID 4980 wrote to memory of 112	4980	cmd.exe	WriteFile.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\7300c7b0a478fe6da9bf95c90630f0bb712127e52e99aaad889428a2de1fbc5f.exe
"C:\Users\Admin\AppData\Local\Temp\7300c7b0a478fe6da9bf95c90630f0bb712127e52e99aaad889428a2de1fbc5f.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2352
- C:\Client.exe
  "C:\Client.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4300
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "WriteFile" /tr '"C:\Users\Admin\AppData\Roaming\WriteFile.exe"' & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2516
  - - C:\Windows\system32\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "WriteFile" /tr '"C:\Users\Admin\AppData\Roaming\WriteFile.exe"'
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:4640
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpB721.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4980
  - - C:\Windows\system32\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:2380
  - - C:\Users\Admin\AppData\Roaming\WriteFile.exe
      "C:\Users\Admin\AppData\Roaming\WriteFile.exe"
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:112
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2352 -s 1764
  2⤵
  - Program crash
  PID:620

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 2352 -ip 2352
1⤵
PID:2724

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Client.exe

Filesize
74KB

MD5
b7d579e26b673c6866c448e6af708515

SHA1
ef19b6d6fcd369c8636dc0539dd32589a89f2c09

SHA256
6035245b15f24292d031bb460c6b9a4301ced628f93d37b58771aca3b49aa07a

SHA512
df0ad0004e9e40274bdd4ac586400b096679d456e35b0ac2a2d25c15cff17557428bb38023c8ed38c52e3d7eef962cfd1c3092f82fe5ea2ef1cf0ea442c8741c

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpB721.tmp.bat

Filesize
153B

MD5
804c2f6e446281321dad2df8b0d02e28

SHA1
89b9162db418b5975f0aa0d218e9cadcedfeee33

SHA256
c79d1da703900051cbf78f810920e18b184785601ff21635b2e60627844b5933

SHA512
095bcab170b3885a1b326afa8ce27b01779955e6abe9142e102decb58e9b07cf4eaf8efe3fc2c4a430e459423a1e4de82f02127fa60f35efc66370137a97c585

Download Submit
C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf

Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

Download Submit
memory/2352-19-0x0000000000400000-0x00000000005FF000-memory.dmp

Filesize
2.0MB

Download
memory/2352-1-0x0000000068CD0000-0x0000000068CDF000-memory.dmp

Filesize
60KB

Download
memory/2352-2-0x0000000068CD0000-0x0000000068CDF000-memory.dmp

Filesize
60KB

Download
memory/2352-3-0x0000000000400000-0x00000000005FF000-memory.dmp

Filesize
2.0MB

Download
memory/2352-0-0x0000000000400000-0x00000000005FF000-memory.dmp

Filesize
2.0MB

Download
memory/4300-16-0x0000000000270000-0x0000000000288000-memory.dmp

Filesize
96KB

Download
memory/4300-24-0x00007FFACB8A0000-0x00007FFACC361000-memory.dmp

Filesize
10.8MB

Download
memory/4300-25-0x00007FFACB8A0000-0x00007FFACC361000-memory.dmp

Filesize
10.8MB

Download
memory/4300-18-0x00007FFACB8A0000-0x00007FFACC361000-memory.dmp

Filesize
10.8MB

Download
memory/4300-15-0x00007FFACB8A3000-0x00007FFACB8A5000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads